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A139920
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Primes of the form 19x^2+18xy+19y^2.
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2
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19, 59, 131, 139, 251, 419, 619, 691, 811, 859, 971, 1091, 1259, 1291, 1459, 1531, 1571, 1699, 1811, 1931, 1979, 2099, 2131, 2371, 2411, 2539, 2579, 2659, 2819, 2939, 2971, 3251, 3331, 3491, 3499, 3659, 3779, 4051, 4091, 4219, 4259, 4339
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OFFSET
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1,1
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COMMENTS
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Discriminant=-1120. See A139827 for more information.
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LINKS
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FORMULA
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The primes are congruent to {19, 59, 131, 139, 171, 251} (mod 280).
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MATHEMATICA
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Union[QuadPrimes2[19, 18, 19, 10000], QuadPrimes2[19, -18, 19, 10000]] (* see A106856 *)
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PROG
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(Magma) [ p: p in PrimesUpTo(6000) | p mod 280 in [19, 59, 131, 139, 171, 251]]; // Vincenzo Librandi, Aug 01 2012
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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